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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.implementation.jaxrs.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import javax.ws.rs.Path;
import javax.ws.rs.core.Application;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Service;
import org.apache.tuscany.sca.binding.rest.RESTBinding;
import org.apache.tuscany.sca.binding.rest.RESTBindingFactory;
import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.resolver.ClassReference;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.implementation.jaxrs.JAXRSImplementation;
import org.apache.tuscany.sca.implementation.jaxrs.JAXRSImplementationFactory;
import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* Implements a StAX artifact processor for Web implementations.
*/
public class JAXRSImplementationProcessor extends BaseStAXArtifactProcessor implements
StAXArtifactProcessor<JAXRSImplementation> {
private static final QName IMPLEMENTATION_JAXRS = JAXRSImplementation.TYPE;
private AssemblyFactory assemblyFactory;
private JAXRSImplementationFactory implementationFactory;
private RESTBindingFactory restBindingFactory;
private JavaInterfaceFactory javaInterfaceFactory;
public JAXRSImplementationProcessor(ExtensionPointRegistry extensionPoints) {
FactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(FactoryExtensionPoint.class);
this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
this.implementationFactory = modelFactories.getFactory(JAXRSImplementationFactory.class);
this.restBindingFactory = modelFactories.getFactory(RESTBindingFactory.class);
this.javaInterfaceFactory = modelFactories.getFactory(JavaInterfaceFactory.class);
}
public QName getArtifactType() {
// Returns the QName of the XML element processed by this processor
return IMPLEMENTATION_JAXRS;
}
public Class<JAXRSImplementation> getModelType() {
// Returns the type of model processed by this processor
return JAXRSImplementation.class;
}
public JAXRSImplementation read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException,
XMLStreamException {
// Read an <implementation.web> element
JAXRSImplementation implementation = implementationFactory.createJAXRSImplementation();
implementation.setUnresolved(true);
String application = reader.getAttributeValue(null, "application");
if (application != null) {
implementation.setApplication(application);
}
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_JAXRS.equals(reader.getName())) {
break;
}
}
return implementation;
}
public void resolve(JAXRSImplementation implementation, ModelResolver resolver, ProcessorContext context)
throws ContributionResolveException {
ClassReference classReference = new ClassReference(implementation.getApplication());
classReference = resolver.resolveModel(ClassReference.class, classReference, context);
implementation.setApplicationClass(classReference.getJavaClass());
implementation.setUnresolved(false);
Application application;
try {
application = (Application) implementation.getApplicationClass().newInstance();
} catch (Exception e) {
throw new ContributionResolveException(e);
}
for(Class<?> rootResourceClass: application.getClasses()) {
addService(implementation, rootResourceClass);
}
for(Object rootResource: application.getSingletons()) {
addService(implementation, rootResource.getClass());
}
}
private void addService(JAXRSImplementation implementation, Class<?> rootResourceClass) {
Service service = assemblyFactory.createService();
JavaInterfaceContract contract = javaInterfaceFactory.createJavaInterfaceContract();
JavaInterface javaInterface;
try {
javaInterface = javaInterfaceFactory.createJavaInterface(rootResourceClass);
} catch (InvalidInterfaceException e) {
throw new ServiceRuntimeException(e);
}
contract.setInterface(javaInterface);
service.setInterfaceContract(contract);
RESTBinding binding = restBindingFactory.createRESTBinding();
// FIXME: The @ApplicationPath is available for JAX-RS 1.1
// binding.setURI("/");
Path path = rootResourceClass.getAnnotation(Path.class);
if (path != null) {
binding.setURI(path.value());
}
service.getBindings().add(binding);
service.setName(rootResourceClass.getSimpleName());
implementation.getServices().add(service);
}
public void write(JAXRSImplementation implementation, XMLStreamWriter writer, ProcessorContext context)
throws ContributionWriteException, XMLStreamException {
// Write <implementation.jaxrs>
writeStart(writer,
IMPLEMENTATION_JAXRS.getNamespaceURI(),
IMPLEMENTATION_JAXRS.getLocalPart(),
new XAttr("application", implementation.getApplication()));
writeEnd(writer);
}
}
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